Combined gas and coal burning grate



2 Sheets-Sheet 1.

(No Model.)

.0. H. MILLER. COMBINED GAS AND GOAL BURNING GNATN.

II'AN 2 Sheets-Sheet 2.

(No Model.)

c. H. MILLER. l COMBINED GAS AND GOAL BURNING GRATB.

-N0. 362,648. PatentedMay 10, 1887.

Inventor.

Zar/JH 77Z 22er lDer MW l Wnesses.

Atty.

UNITED STATES PATENT CEEIQE.

CHARLES H'. MILLER, OF ERI-E, PENNSYLVANIA.

COMBINED GAS AND COAL BURNING GRATSE.

SPECIFICATION forming pai-t of Letters Patent No, 362,648, eared may 1o,les?.

Application filed December 2, 1886. Serial No. 220,543. (No model.)

To all whom t may concern.-

Beit known that I, CHARLES H. MILLER, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented certain new and useful Improvements in Combined Gas and CoalBurning Grates; and Ido hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and usethesame, reference being had tothe accompanying drawings, and to theletters of reference marked thereon, forming part of this specification.

My invention relates to combination gas and coal grates; and it consistsin the improvements hereinafter set forth and explained.

My invention is illustrated in the accompanying drawings, in whichFigure 1 is a perspective'view of one form of my improved grate. Fig. 2is a central longitudinal vertical section of same. Fig. 3 is a centralvertical cross section of same. Fig. 4 is a perspective view of anotherform of my improved grat-e. Y Fig. 5 is aperspective view of amodification of the form of grate shown in Fig. 4. Fig. 6 is aperspective view of the same with one end removed.

Like letters refer to like parts in all the figures.

The objects of my improvement are to construct a grate in such a mannerthat either gas, coal, or Wood may be burned therein with equalfacility, or gas and either coal or wood burned at the same. time instoves, grates, or furnaces fitted therewith, withoutinjury to the grateor Without any change or adjustment of the burners or grates therein;also, in the construction of a deflector in the gas-distributing chamberof the grate, and also in providing ledges projecting over thegas-discharge openings in such a shape as to prevent dust and ashes fromentering therein. To accomplish these objects Iconstruet my improvedcombined gas and coal grate ofbars of suitable length and shape to fitthe stove grate or frame to which it is applied, and provide one or moregas passages orm chambers, preferably castas an integral part of thegrate, to which the gassupply pipe is attached, these passages orchambers being provided with small dischargeopenings, and preferablywith gas defieetors, v

as hereinafter described.

In Fig. I I show a form of grate used by me in cooking stoves andranges. This grate I construct of the bars A, which are centrallyconnected together throughout the entire grate by a gas passage orchamber, B, the bars and the chamber B being preferably east in a singlepiece, the central part being cored out from end to end in casting, asshown in Figs. 2 and 3. In the central part of the bottom of the chamberB, I provide a thimble, C, in which the gas-supply D is secured. Theends of the chamber B, I close by means of caps E E', one vof which, E',is' provided with a bearing, e', and the other, E, with a bearing, e, towhich a shaker can be applied to dump the grate when it is not connectedwith the gas-supply pipe D, these caps E and E being held in place by arod, F, which extends through the chamber B from one cap to the other.

Within the chamber B, I preferably place a gas-dellector, G, constructedwith an open bottom and with holes g in the top thereof, substantiallyin the shape shown in Figs. 2 and 3, and also with holes g g in the endsthereof to admit the rod F. The holes g, it will be observed, arepreferably made of small diameter at the central part-of the defiectorG, and gradually increase in size toward each end thereof, the obj eetof this being to more perfectly distribute the gas toward the ends ofthe grate. The top b of the chamber B, I provide with lugs A', to keepthe coal or other fuel from close contact with the top of the chamber. Ipreferably make this top b highest in the centerfrom which point itfalls at an' angle of about forty-five degrees toa point slightly beyondthe sides b b of the chamber B, so as to form ledges a a along the topof and overhanging the sides b b. Directly under these ledges a a, andbetween each of the bars A, I bore small gas-discharge openings do oneach side of the chamber B, the ledges a a preventing dust and 'ashesfrom` entering therein. I can, however, if desired, make additionaldischargeopenings in the top b.

It will readily be seen that the gas enters the grate through thesupply-pipe D, where the deiie'ctor G distributes it evenly throughoutthe entire length of the grate. 'Ihe gas,

IOO

passing from the deiector G through the openm ings g, is broughtdirectly in contact with the inside of the top b of the chamber B, where:it is superheated by contact therewith ,and thence it is deflecteddownward in its passage, as shown by arrows in Figs. 2 and 3, until itpasses out of the openings a c', when it is con sumed.

The grate shown in Fig. 4 is constructed and operates in all respectslike that hereinbefore described, except in that the gratebars A thereofare constructed of such shape as to adapt this grate for use in an openstove of the Franklin type, and those shown in Figs. 5 and 6 are also oflike construction and operation, except that they are constructed withlegs H and ends I I, of suitable shape to adapt the grate to be placedin and used in an ordinary chimney fireplace by simply taking out theordinary coal or Wood burning devices and putting this grate in itsplace and connecting the gas-supply pipe thereto.

Having thus fully described my invention, so as to enable others toconstruct and use the saine, what I claim as new, and desire to sccureby Letters Patent of the United States, is-

1. The combination, in a grate adapted to burn gas or coal or otherfuel, of the gasehamber B, having gas-outlets e e therein, withgratebars A thereon, lugs A on the top b thereof, and ledges a a on thesides thereof, overhanging the gas-openings a'a therein, substantiallyas and for the purpose set forth.

2. The combination, in a grate adapted to burn gas, coal, or other fuel,ofthe grate-*bars i A and the gas chamber orpussage B, having the lugs Aon the top b thereof and the ledges a a on each side thereof', with thegas outlet openings a a', the gas-deflectcr G, provided with holes g,and the gas-supply pipe D, substantially as and for the purpose setforth.

In testimony whereofl affix my signature in presence of two witnesses.

CHARLES H. M ILLEIt. TWitnesses:

GEO. S. STURGnoN, Cniis. C. SUIRK.

